728674 has 4 divisors (see below), whose sum is σ = 1093014. Its totient is φ = 364336.

The previous prime is 728659. The next prime is 728681. The reversal of 728674 is 476827.

728674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 431649 + 297025 = 657^2 + 545^2 .

It is a congruent number.

It is an unprimeable number.

728674 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182167 + ... + 182170.

2⁷²⁸⁶⁷⁴ is an apocalyptic number.

728674 is a deficient number, since it is larger than the sum of its proper divisors (364340).

728674 is a wasteful number, since it uses less digits than its factorization.

728674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364339.

The product of its digits is 18816, while the sum is 34.

The square root of 728674 is about 853.6240390242. The cubic root of 728674 is about 89.9865823619.

The spelling of 728674 in words is "seven hundred twenty-eight thousand, six hundred seventy-four".